1. Mehlich 3 Extraction of Boron in Boron Treated Soils as Compared to Other Extractants
- Author
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A. K. Shiffler, Bruce L. Webb, S. A. Redd, Von D. Jolley, and V. A. Haby
- Subjects
Soil test ,Chemistry ,Pentetic acid ,Extraction (chemistry) ,Soil Science ,Sowing ,chemistry.chemical_element ,Hot water extraction ,chemistry.chemical_compound ,Agronomy ,Loam ,Soil water ,Boron ,Agronomy and Crop Science - Abstract
Hot water extraction (HW) is time‐consuming, highly variable, and losing popularity as the standard method for estimating plant‐available boron (B) in soil. Proposed alternatives are not widely used and guesstimation is replacing assessment at many soil test facilities. Mehlich 3 is increasingly promoted as a universal extractant, and diethylenetriaminepentaacetic acid (DTPA)–sorbitol and pressurized hot water (PHW) are effective and comparable to hot water extraction but also simpler and easier. Mehlich 3 B extraction has been compared mainly to hot water extraction. Because Mehlich 3 usage would be limited to neutral to acid soils, this study used a limed acid Darco loamy fine sand (loamy, siliceous, semiactive, thermic Grossarenic Paleudult) from eastern Texas to which 10 rates of B were applied followed by either incubation without plants or planting to alfalfa in greenhouse pots. Mehlich 3 extraction of soils obtained from a long‐term experiment on Darco soil from which alfalfa yield respons... more...
- Published
- 2008
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